What can a centralized power node provide for a fiber-optic node?

A centralized power node serves a vital role in supporting the infrastructure of fiber-optic networks. It primarily ensures that there is adequate power supply to necessary components within the fiber-optic node, such as amplifiers and network interface devices (NIDs). Amplifiers are essential for boosting signals over long distances, while NIDs facilitate the connection between the optical network and end-user devices.

By providing sufficient power, the centralized power node enhances the overall reliability and performance of the fiber-optic network, which is crucial for maintaining high data transmission rates and overall service quality. This is especially important in modern network applications where data demand is high and uninterrupted service is critical.

In contrast, the other options do not align with the main functions of a centralized power node. For example, while backup power is significant, it’s more specific to maintenance scenarios rather than the primary function of the centralized node. The focus on telephony services and residential use is also too limited, as centralized power nodes are involved in a broader range of services and applications beyond basic telephony.